JP2010269363A - Friction-welding machine, and friction-welding and machining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction-welding machine capable of continuously friction-welding not only a couple of workpieces but also three or more thereof and further capable of combining with machining, and to provide a friction welding/machining method. <P>SOLUTION: The rotary chucks 11 and 21 for holding the workpieces are disposed side by side facing each other, and have the spindle motors for controlling the rotary driving thereof. Further, at least one rotary chuck has a feed motor controlled so as to generate the upsetting force necessary for melt welding, and a workpiece holding means 50 is disposed between the rotary chucks facing each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a friction welding machine for friction welding of a plurality of workpieces, and a friction welding and machining method using the same.

A friction welding method in which a rotational friction force is generated on the joining surfaces of the workpieces and the heat energy generated by the rotational friction is used to perform press solid phase bonding is known (Patent Document 1).
However, in the conventional friction welding machine, even if two workpieces can be joined, three or more workpieces cannot be friction welded or machined simultaneously or continuously.

JP 2008-272834 A

  An object of the present invention is to provide a friction welding machine, a friction welding machine, and a machining method capable of simultaneously or continuously friction welding two or more workpieces as well as two workpieces or combining machining. And

In the friction welding machine according to the present invention, rotating chucks that hold a workpiece chuck are arranged opposite to each other, the left and right rotating chucks include a spindle motor that rotationally controls the rotating chuck, and at least one rotating chuck. It has a feed motor controlled so as to generate an upsetting force and an upsetting force required at the time of melt pressure welding, and has a workpiece holding means between the opposed rotary chucks.
Here, the rotary chuck arranged opposite to the rotary chuck is provided with a rotation drive control means, and at least one of the rotary chucks has a feed motor that generates a pressing force necessary for friction welding of upsetting force and upset force. The workpiece W1 is chucked, the workpiece holding means holds the workpiece W2, the one rotary chuck is rotationally driven, and the rotary chuck or the workpiece holding means is fed and controlled in the Z-axis direction. The workpiece W1 is friction-welded to one surface of the workpiece W2, and then or simultaneously, the workpiece W3 is chucked by the other rotating chuck, and the other rotating chuck is rotationally driven and feed-pressed to control the workpiece W2. The workpiece W3 can be friction-welded to the other surface.
The upsetting force refers to a force that presses so as to generate a necessary amount of heat at the time of rotational friction, and the upset force refers to a force that presses so that the joining surface melts and then solid phase bonding occurs. .

  According to a third aspect of the present invention, there is provided a friction welding and machining method for a workpiece, wherein rotating chucks for holding the workpiece are opposed to each other on the left and right sides, and the left and right rotating chucks are connected to a spindle motor for rotationally controlling the rotating chuck; A feed motor that is controlled so as to generate an upsetting force and an upsetting force that are required at the time of melt welding, a work holding means between the opposed rotating chucks, and at least one tool post. Then, the workpiece W1 is fixed to the chuck with one of the rotating chucks, the workpiece W2 is fixed to the chuck with the other rotating chuck, the one rotating chuck is rotationally driven, the other rotating chuck is stationary, and the feed pressing control is performed. As a result, the workpieces W1 and W2 are friction-welded, and the workpieces W1 and W2 thus friction-welded are delivered to one rotary chuck, and the workpiece holding While centers holding the end face of the workpiece W1 · W2 in means, characterized in that machining at tool provided on the tool rest.

In the present invention, a rotary chuck provided with a spindle motor and at least one feed motor is disposed opposite to each other, and a workpiece holding means and a tool post are provided therebetween, so that three workpieces can be friction-welded simultaneously or continuously. Also, end face processing before friction welding and machining after friction welding can be performed with the tool post.
Furthermore, if the end surface of the workpiece is held in the center by the workpiece holding means, it is possible to machine a long material.
In addition, since the workpieces can be transferred between the opposed rotating chucks, the phases of a plurality of workpieces can be easily determined in milling processing or the like.

An example of the procedure for friction welding the three workpieces is shown. An example of a procedure for friction welding and machining a long material will be shown. An example of performing a tensile strength test after friction welding is shown. An example of cutting evaluation of the joint after friction welding will be shown. An example of a procedure for machining and friction welding three or more workpieces will be shown. The structural example of the friction welding machine which concerns on this invention is shown.

A configuration example of the friction welding machine according to the present invention will be described with reference to FIG.
On the left side of the base 1, an L-side spindle 20 and an L-side chuck 21 that is rotationally driven and controlled by the spindle motor are provided.
An R-side main shaft 10 is disposed on the right side so that the L-side main shaft and the axis coincide with each other, and an R-side chuck 11 is rotationally controlled by this main shaft motor.
In this embodiment, the R-side main shaft 10 is controlled to move in the Z-axis direction by the R-side feed motor 12 and the ball screw 13.
It is only necessary that at least one of the two main shafts arranged opposite to each other has a feed motor whose position is controlled in the Z-axis direction.
In this specification, the axial direction of the main axis is expressed as the Z axis, the direction perpendicular to the Z axis parallel to the base surface is expressed as the X axis, and the direction perpendicular to the base surface is expressed as the Y axis.
The R-side feed motor 12 is a servo motor and is servo-controlled so as to obtain an upsetting pressure and an upset force (pressing force) in the friction welding process.

A first tool post 30 having a first turret 31 is provided on the upper side of the drawing in FIG. 6 from the axis of the L-side spindle 20 and the R-side spindle 10.
The first tool post 30 includes a feed motor 32 that controls movement in the Z-axis direction via a ball screw 32a, a feed motor 33 that controls the feed position in the X-axis direction from the direction orthogonal to the main axis to the main axis, and the position in the Y-axis direction. It has a feed motor 34 to be controlled.
The first turret 31 can be indexed by the turning indexing device 35.

Similarly, a second tool post 40 having a second turret 41 is provided below the main axis.
The position of the second tool post 40 in the Z-axis direction, the X-axis direction, and the Y-axis direction is controlled by a feed motor 42 having a ball screw 42a and feed motors 43 and 44, respectively.
Further, the second turret 41 can be indexed by the turning index device 45.
In this embodiment, a two turret type including two sets of turrets is shown, but a one turret type, a three turret type, and a four turret type may be used.
The tool post may be provided with a tool post controlled around the B axis.

Next, an example in which three workpieces are friction-welded simultaneously or continuously will be described with reference to FIG.
The first workpiece W1 is chuck-fixed to the L-side chuck 21, and the second workpiece W2 is chucked and held by a workpiece holder 50 as workpiece holding means attached to the tool post 40.
The L-side spindle 20 is rotated by the spindle motor, and the tool post 40 is fed by the feed motor in the Z-axis direction toward the L-side spindle 20 to apply upsetting force.
Thereby, the contact surface between W1 and W2 generates heat due to friction, and the metal is softened and melted.
When the local melting to a predetermined state is performed, the rotation of the L-side spindle 20 is stopped, and the contact surface between W1 and W2 is solid-phase bonded by applying an upset force in the Z-axis direction with the tool post 40.
At this time, the third work W3 is fixed to the R-side chuck 11 of the R-side spindle 10, the work W3 is pressed against the back surface of the work W2, and the contact surface between the works W2 and W3 is controlled by the rotation control of the R-side spindle 10. The workpieces W1, W2, and W3 can be simultaneously friction-welded by generating frictional heat and pressurizing predetermined upset force and upset force to the R-side spindle 10 by the R-side feed motor 12.
Although the workpieces W1, W2, and W3 may be friction-welded simultaneously, as shown in FIG. 1B, the R-side spindle 10 is continuously applied after the workpiece W1 is friction-welded to one surface of the workpiece W2. The workpiece W3 may be friction-welded to the other surface of the workpiece W2.
In this embodiment, the Z-axis direction feed motor 12 is provided on the R-side spindle 10. However, if the L-side spindle 20 is also provided with a Z-axis feed motor, the workpiece attached to the tool post 40 is provided. It is also possible to hold and fix the workpiece W2 to the holder 50 and to frictionally press the workpiece W2 between the main shafts 20 and 10 facing from both sides.

Next, based on FIG. 2, an example in which the friction welding of the workpiece is combined with machining such as turning or cutting will be described.
The workpiece W1 is chucked to the L-side chuck 21, the workpiece W2 is chucked to the R-side chuck 11, the rotation control of the L-side spindle 20 is controlled, and the servo control of the R-side feed motor is performed with the rotation of the R-side spindle 10 stopped. Thus, an upsetting force is applied to generate frictional heat, then the rotation of the L-side spindle 20 is stopped, and an upset force is applied to frictionally weld the workpieces W1 and W2.
Since the friction welding machine according to the present invention includes the first tool post 30 having the first turret 31, the joined workpieces W1 and W2 are transferred to, for example, the L-side chuck 21 and turned by the bite tool 36. Cutting can be performed with a drill tool, milling tool 37, or the like.
When the workpieces W1 and W2 are long, the work center pin 51 is attached to the workpiece holding means as shown in FIG. 2D, and the end surfaces of the long workpieces W1 and W2 are pressed and held in the center. And can be machined with tools 36 and 37.
This facilitates the management of the overall length of the workpiece and the phase determination of the workpieces W1 and W2 during milling.

FIG. 3 shows an evaluation example of a workpiece subjected to friction welding.
The workpiece W1 is chucked on the L-side chuck 21, the workpiece W2 is chucked on the R-side chuck 11, and in the case of the 2-turret type, the joining surfaces of the left and right workpieces W1, W2 are adjusted with the tool tools 36, 46. FIG. As shown in (b), the workpieces W1 and W2 are friction-welded in the same manner as described above.
In the friction welding machine according to the present invention, since the R-side main shaft 10 is feed-controlled in the Z-axis direction, the joining force of the joining surface is evaluated by applying a tensile force F as shown in FIG. be able to.
Moreover, as shown in FIG.4 (c), a cutting surface can be formed in a junction part with the milling tool 38, and the metal structure of a junction part can also be observed and evaluated as shown in FIG.4 (e).

FIG. 5 shows an example in which machining and friction welding are continuously performed.
The workpiece W1 is chucked to the L-side chuck 21, the workpiece W2 is chucked to the R-side chuck 11, and the joint surface is machined as necessary with the tool 36 attached to the tool post 30, 40, etc. W2 is friction-welded as shown in FIG.
The workpieces W1 and W2 that have been friction-welded are transferred to the R-side chuck 11, the next workpiece W3 is chucked to the L-side chuck 21, and the bonding surface is processed and adjusted with a bite tool 36 or the like as required. ), The workpiece W3 can be continuously friction-welded to W1.
In this manner, three or more workpieces can be continuously joined while machining and friction welding.

10 R-axis spindle 11 R-side chuck 12 R-side feed motor 20 L-side spindle 21 L-side chuck 30 First tool post 31 First turret 40 Second tool post 41 Second turret

Claims (3)

  Rotating chucks that hold the work chuck are arranged opposite to the left and right, the left and right rotating chucks have a spindle motor that controls the rotation of the rotating chuck, and at least one rotating chuck has an upsetting force required for melt pressure welding. A friction welding machine comprising: a feed motor controlled so as to generate an upset force; and workpiece holding means between opposed rotary chucks. Rotating chucks that hold the work chuck are arranged opposite to the left and right, the left and right rotating chucks have a spindle motor that controls the rotation of the rotating chuck, and at least one rotating chuck has an upsetting force required for melt pressure welding. A feed motor controlled to generate an upset force, and a work holding means between the opposed rotating chucks,
The workpiece W1 is chuck-fixed by any one of the rotating chucks, the workpiece W2 is held by the workpiece holding means, the one rotating chuck is controlled to rotate, and the rotating chuck or the workpiece holding means is moved in the Z-axis direction. The workpiece W1 is friction-welded to one surface of the workpiece W2 by feeding and controlling
Next, or simultaneously, the workpiece W3 is fixed to the chuck by the other rotary chuck, and the workpiece W3 is friction-welded to the other surface of the workpiece W2 by rotationally driving and feeding and pressing the other rotary chuck. The friction welding method. Rotating chucks that hold the work chuck are arranged opposite to the left and right, the left and right rotating chucks have a spindle motor that controls the rotation of the rotating chuck, and at least one rotating chuck has an upsetting force required for melt pressure welding. A feed motor controlled to generate an upset force, and a work holding means between the opposed rotating chucks,
And at least one tool post,
The workpiece W1 is fixed to the chuck with one of the rotating chucks, the workpiece W2 is fixed to the chuck with the other rotating chuck, the one rotating chuck is rotationally driven, the other rotating chuck is stationary, and feed pressure control is performed. Then, the workpieces W1 and W2 are friction welded,
The workpieces W1 and W2 that are friction-welded are delivered to one rotary chuck, and the end surfaces of the workpieces W1 and W2 are center-held by the workpiece holding means and machined by a tool provided on the tool post. Friction welding and machining method for workpiece

Images